\begin{tabular}{l*{7}{c}} \toprule
          &\multicolumn{1}{c}{Mean}&\multicolumn{1}{c}{SD}&\multicolumn{1}{c}{Median}&\multicolumn{1}{c}{IQR}&\multicolumn{1}{c}{Min.}&\multicolumn{1}{c}{Max.}&\multicolumn{1}{c}{Obs.}\\
\midrule
          &         &         &         &         &         &         &         \\
{\bf 2014}&         &         &         &         &         &         &         \\
SPF       &    18.54&    17.91&    10.25&    25.00&     0.00&    70.00&       38\\
SCE       &    38.55&    23.37&    40.00&    30.00&     0.00&   100.00&     1272\\
          &         &         &         &         &         &         &         \\
{\bf 2015}&         &         &         &         &         &         &         \\
SPF       &    27.74&    22.83&    21.00&    30.00&     0.00&    96.00&       37\\
SCE       &    34.63&    22.44&    30.00&    35.00&     0.00&   100.00&     1268\\
          &         &         &         &         &         &         &         \\
{\bf 2016}&         &         &         &         &         &         &         \\
SPF       &    37.61&    20.54&    29.00&    39.50&     0.00&    80.00&       36\\
SCE       &    39.56&    21.98&    30.00&    40.00&     0.00&   100.00&     1258\\
          &         &         &         &         &         &         &         \\
\bottomrule \end{tabular}
